P: Support filtering for "empty" location / title / keywords

Ensuring that each of my images has an accurate location is an important part of my workflow. I can page through a set one image at at a time but I would LOVE to be able to use filters for this. I can pull down Filter | Locations and it will show me a list of all locations in the current album, but none of them is “is blank”. This ability, to search for empty values, would be very much welcome (and has always been possible in Apple Photos!)

Empty location is just one example - if this feature gets built, I hope the logic applies equally to all filters - I want to be able to quickly find images with missing titles, or with no keywords, etc.